Derrick



(No Model.)

A. REITZ.

DERRICK.

No. 298,405. Patented May 13, 1884.

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ADAM REITZ, OF ST. LOUIS, MISSOURI.

DERRICK.

SPECIFICATION forming part of Letters Patent No. 298,405, dated May 13,188%.

Application filed April 7, 1884. (No model.)

To all whom, it may concern:

Be it known that I, ADAM BEITZ, a citizen of the United States, residingat St. Louis, in the State of Missouri, have invented a new and usefulPortable Derrick, of which the following is a specification.

The object of my invention is to overcome the present difficultiesexisting in loading and unloading large and heavy stones on and offwagons in stone-yards, which is usually accomplished by means of rollersand bars, which method is cumbersome, slow, and expensive, as well asdifficult and unsafe.

My invention consists in anew and improved derrick which can easily bemoved from place to place, as desired.

To better describe the construction of my improved derrick, and tobetter enable others to understand the same, reference is had to theaccompanying drawings, in which- Figure 1 is a cross-section of myderrick as in use. Figs. 2 and 3 combined are a side elevation. Fig. 4:is aperspective view of a piece of the lowerarch. Fig. 5 isa perspectiveview of a piece of the upper arch.

Similar letters refer to similar parts throughout the several views.

A are legs or standards, made of plate iron or steel, and A is an archconnecting these legs, also being of plate iron or steel. The legs andarch are made in two or more seetions, the purpose of which will behereinafter fully described, or they can both be of one piece. The spanof the arch or space between both legs will be made sufticiently largeto span or bridge over any ordinary wagon, and the height in clear ofthe arch will be made sufficient to allow the stone to be moved to fullyclear the wheels of the wagon.

B is a sub-arch which spans over the lower arch, A, and has legs orstandards B, and is similarly constructed of plate metal, insections-two or 1noreor in one piece, but has a larger radius, andserves as a brace or strengthener for the lower arch, A.

a are braces between the two arches, to keep them both firm.

a are straps bolted around both arch and the legs of both arches to keepthem together.

0 To the side of one le is secured a crab or 5 a winding mechanism, 0,of the ordinary crank, drum, and gearing. From the drum a rope or wirecable, 0, passes over a pulley, 0,011 the upper part of the leg, andthence in the groove 0 formed in the plate-iron of the inner arch, andover rollers c on the top of the arch A, to the middle of same, down andaround pulley-blocks c c, to which the chain and hooks for holding thestone are attached. From the blocks the cable passes over a roller onthe other half of the arch, and around the latter, down to and throughthe foot-plate O of the other leg, and fastened to same.

To enable stones of unusual size to be raised by my derrick, I make thearches in two or more sections. These sections are indicated as 1 2 34., &c.

dare ribs riveted on the one side of the plates, and their ends projectover from one section. to the other, so that when said sections areapart the space between is bridged over by said ribs.

Between the ribs of the lower arch and its legs I make a groove, 0, toallow the rope or cable to run in.

0 are bars forming rollers for the cable, and these rollersturn ingrooves formed crosswise in the plate of the inner arch. (Clearly shownin Fig. 4.)

d are casters, rollers, or wheels under each foot plate, which permitthe derrick to be moved from one place to another in the yard; or, ifdesired, wheels may be used to run on a tramway. 1

e are braces for steadying the legs' on the foot-plates.

e are braces which extend from the plate 6 top of the arch, to theground, and serve to keep the derrick plumb.

c is a cross-brace to keep the legs from spreading.

This derrick may be made of any size and to suit the purpose of turningand lifting stones for blocking up while they are being dressed. Its usemay be adapted for other purposes, such as raising heavy timber inlumber-yards, 85c.

Having thus fully described the construction of myimproved derrick, whatI claim is' 1. A portable derrick constructed to form anarch, as hereinshown and described, the rope or cable passing from a crab on one .leg,up and over the arch to its middle,thence down and throughpulley-blocks, and finally up and over the other half of the arch, down,and fastbeing constructed of plate metal, having ribs 10 ening to thefoot-plate of the other leg. d, and the groove 0 in the inner arch andlegs,

2. In a portable derrick, the legsA and B, and the braces a and strapsa, all constructed and double archAandB, formed insections or as hereinshown and described, and for the of one piece, the foot-plates G,casters or purpose set forth. wheels d, crab G, and the rope or cable 0,all I combined and constructed as herein shown Witnesses: and described,as and for the purpose set forth.

3. In a portable derrick, the legs and arches,

ADAM REITZ.

CHAS. F. MEIsNisR, CHAS. E. METZ.

